Study of the Degree of Toxicity of Soil, Littoral Vegetation and Water of the Lake Shira Using a Paramecium Biotest
V. E. SAZONOVA, V. B. KIRDEEVA, E. V. AFANASYEVE
Abstract
The studies of the degree of toxicity of the soil, vegetation and water of the lake Shira using Paramecium caudatum as the test object have demonstrated that on the whole the littoral vegetation is not toxic. The littoral soils at the depth of 20 and 40 cm have a toxicity index of IV and V, which witnesses to their critical condition. The slightest decrease of the toxicity index can lead to worsening of the soil and, possibly, to irreversible changes. The terst object used has detected the increase of degree of toxicity of water and plants in sites of anthropogenous loading (beach, boiler house).
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